Accounting Policies, by Policy (Policies)	3 Months Ended
Mar. 31, 2025
Basis of Presentation and Accounting Policies [Abstract]
Basis of Presentation	*Basis of Presentation* The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. All material intercompany transactions and balances have been eliminated. These financial statements should be read in conjunction with the financial statements and notes thereto included in our 2024 Annual Report. The Consolidated Balance Sheet at December 31, 2024, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. The preparation of the interim unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the interim unaudited consolidated financial statements and the reported amounts of revenues, claims, and expenses during the reporting period. We make estimates and assumptions that can have a significant effect on amounts and disclosures we report in our unaudited consolidated financial statements. The most significant estimates relate to our reserves for unpaid losses and loss adjustment expenses, earned premiums for crop insurance, valuation of investments, determination of credit impairments, valuation allowances for deferred income tax assets, deferred policy acquisition costs, as well as valuation and impairments of goodwill and other intangible assets. While we believe our estimates are appropriate, the ultimate amounts may differ from the estimates provided. We regularly review our methods for making these estimates as well as the continued appropriateness of the estimated amounts, and we reflect any adjustment we consider necessary in our current results of operations. Operating results for the interim period ended March 31, 2025, are not necessarily indicative of the results that may be expected for the year ending December 31, 2025. Our 2024 Annual Report describes the accounting policies and estimates that are critical to the understanding of our results of operations, financial condition, and liquidity. The accounting policies and estimation processes described in the 2024 Annual Report were consistently applied to the unaudited consolidated financial statements as of and for the three months ended March 31, 2025 and 2024.
Discontinued Operations	*Discontinued Operations* On May 7, 2024, NI Holdings entered into a Stock Purchase Agreement (“Purchase Agreement”) to sell its subsidiary, Westminster, to Scott Insurance Holdings, a privately owned Maryland limited liability company. Scott Insurance Holdings is affiliated with John Scott, Sr., the father of the president of Westminster, John Scott, Jr. The sale closed on June 30, 2024. The Purchase Agreement included a cash purchase price of $10,500, subject to certain post-closing adjustments, including a post-closing payment to NI Holdings for the amount by which the ending statutory surplus balance for Westminster exceeded $20,000. The post-closing payment received from Scott Insurance Holdings during the third quarter of 2024 was $1,772 and has been included as an adjustment to the purchase price for the calculation of the loss on the sale of Westminster. The sale of Westminster, which represented the majority of our Commercial segment in prior periods, was a strategic shift that has had a major effect on our operations and financial results. Therefore, Westminster has been reported as discontinued operations in the Consolidated Balance Sheets, Consolidated Statements of Operations, and Consolidated Statements of Cash Flows for all periods presented in this Form 10-Q. All current and prior periods reflected in this Form 10-Q have been presented as continuing and discontinued operations, unless otherwise noted. For additional information see Part I, Item 1, Note 19 “Discontinued Operations” of this Form 10-Q.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements* *Adopted* For information regarding accounting pronouncements that the Company adopted during the periods presented, see Part II, Item 8, Note 2 “Recent Accounting Pronouncements” section of the 2024 Annual Report. *Not Yet Adopted* Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” This guidance requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The guidance is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this update are effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact of the new standard on our consolidated financial statements, which is expected to result in enhanced disclosures. Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” This guidance is intended to improve disclosures about a public business entity's expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. Such information should allow investors to better understand an entity's performance, assess future cash flows, and compare performance over time and with other entities. The amendments will require public business entities to disclose in the notes to the financial statements, at each interim and annual reporting period, specific information about certain costs and expenses, including purchases of inventory, employee compensation, depreciation, and intangible asset amortization included in each expense caption presented on the face of the statement of operations, and the total amount of an entity's selling expenses. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, and may be applied either prospectively or retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on the consolidated financial statements.

Accounting Policies, by Policy (Policies)

3 Months Ended

Mar. 31, 2025

Basis of Presentation and Accounting Policies [Abstract]

Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. All material intercompany transactions and balances have been eliminated. These financial statements should be read in conjunction with the financial statements and notes thereto included in our 2024 Annual Report.

The Consolidated Balance Sheet at December 31, 2024, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements.

The preparation of the interim unaudited consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the interim unaudited consolidated financial statements and the reported amounts of revenues, claims, and expenses during the reporting period.

We make estimates and assumptions that can have a significant effect on amounts and disclosures we report in our unaudited consolidated financial statements. The most significant estimates relate to our reserves for unpaid losses and loss adjustment expenses, earned premiums for crop insurance, valuation of investments, determination of credit impairments, valuation allowances for deferred income tax assets, deferred policy acquisition costs, as well as valuation and impairments of goodwill and other intangible assets. While we believe our estimates are appropriate, the ultimate amounts may differ from the estimates provided. We regularly review our methods for making these estimates as well as the continued appropriateness of the estimated amounts, and we reflect any adjustment we consider necessary in our current results of operations.

Operating results for the interim period ended March 31, 2025, are not necessarily indicative of the results that may be expected for the year ending December 31, 2025.

Our 2024 Annual Report describes the accounting policies and estimates that are critical to the understanding of our results of operations, financial condition, and liquidity. The accounting policies and estimation processes described in the 2024 Annual Report were consistently applied to the unaudited consolidated financial statements as of and for the three months ended March 31, 2025 and 2024.

Discontinued Operations

Discontinued Operations

On May 7, 2024, NI Holdings entered into a Stock Purchase Agreement (“Purchase Agreement”) to sell its subsidiary, Westminster, to Scott Insurance Holdings, a privately owned Maryland limited liability company. Scott Insurance Holdings is affiliated with John Scott, Sr., the father of the president of Westminster, John Scott, Jr. The sale closed on June 30, 2024. The Purchase Agreement included a cash purchase price of $10,500, subject to certain post-closing adjustments, including a post-closing payment to NI Holdings for the amount by which the ending statutory surplus balance for Westminster exceeded $20,000. The post-closing payment received from Scott Insurance Holdings during the third quarter of 2024 was $1,772 and has been included as an adjustment to the purchase price for the calculation of the loss on the sale of Westminster. The sale of Westminster, which represented the majority of our Commercial segment in prior periods, was a strategic shift that has had a major effect on our operations and financial results. Therefore, Westminster has been reported as discontinued operations in the Consolidated Balance Sheets, Consolidated Statements of Operations, and Consolidated Statements of Cash Flows for all periods presented in this Form 10-Q. All current and prior periods reflected in this Form 10-Q have been presented as continuing and discontinued operations, unless otherwise noted. For additional information see Part I, Item 1, Note 19 “Discontinued Operations” of this Form 10-Q.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Adopted

For information regarding accounting pronouncements that the Company adopted during the periods presented, see Part II, Item 8, Note 2 “Recent Accounting Pronouncements” section of the 2024 Annual Report.

Not Yet Adopted

Improvements to Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” This guidance requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The guidance is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this update are effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact of the new standard on our consolidated financial statements, which is expected to result in enhanced disclosures.

Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” This guidance is intended to improve disclosures about a public business entity's expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. Such information should allow investors to better understand an entity's performance, assess future cash flows, and compare performance over time and with other entities. The amendments will require public business entities to disclose in the notes to the financial statements, at each interim and annual reporting period, specific information about certain costs and expenses, including purchases of inventory, employee compensation, depreciation, and intangible asset amortization included in each expense caption presented on the face of the statement of operations, and the total amount of an entity's selling expenses. The amendments are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, and may be applied either prospectively or retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this guidance on the consolidated financial statements.